http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
코레일공항철도 전동차 감속구동장치의 진동특성분석을 통한 베어링 결함진단 연구
김세겸(S. K Kim),이정모(J. M. Lee),정철수(C. S Jeong),이용원(Y. W. Lee),오기석(K. S. Oh) 한국도시철도학회 2015 한국도시철도학회논문집 Vol.3 No.2
A Driving Gear that transmits the torque of motor to the wheels of vehicle is one of the most important driving units of railway vehicle. We have to maintain this unit thoroughly to ensure the running safety for railway vehicle. First of all, state of the Driving Gear bearing must be monitored continuously because the major cause of the fault of the Driving Gear is bearing’s flaking come from the contact fatigue of internal gear. In this paper, we measured vibration at the Driving Gear used in the Korail Airport Railroad’s EMU and analyzed natural frequency of the bearing. And then we suggest scientific and effective technique for the maintenance to detect the fault of the Driving Gear bearing without disassembling by analyzing the vibration and frequency of the bearing.
정철(C.Jeong),유봉근(B.K.Yu),김종선(J.S. Kim) 한국소성가공학회 2011 금형가공 심포지엄 Vol.2011 No.9
Injection molding is one of the most general manufacturing processes of polymers. In recent years, caused by development of injection molding and mold technology, more precision product was able to production. Biochip is tool and equipment that biomaterials such as DNA or Protein, and a solid substrate such as materials that have high-density integration, the biological information or information processing speed or increase the rate. To produce these biochips requires precise manufacturing processes. In this paper, to making biochips were used for the injection molding process. As a result of tolerance within 5 um of biochips could be injection molding
사출성형품의 두께변화에 따른 마이크로 패턴의 전사율에 관한 실험적 연구
정철(C. Jeong),김종덕(J. D. Kim),김종선(J. S. Kim),윤경환(K. H. Yoon),황철진(C. J. Hwang) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.5
Injection molding is one of the most general manufacturing processes of polymers. The deformation of final molded parts occurs because of the change of temperature and pressure during injection molding process. The deformation of injection molded parts depends on many operational conditions, such as, melt temperature, injection speed, mold temperature, packing pressure, and the structure of mold. In the present paper, injection molding experiments were performed to find the process conditions to affect the average shrinkage in thickness direction and the replication ratio of fine patterns on the surface for the final injection-molded LGP samples. As a results, in the cases of PC(Polycarbonate), when the melt temperature was under 285℃, both average shrinkage and replication ratios were mainly influenced by packing pressure. However, the replication ratio was more influenced by melt temperature than packing pressure for the cases of higher melt temperature.